Abundance
Stephen Covey first spoke of the Abundance Mentality (or Mindset) in his 1989 classic, The Seven Habits of Highly Effective People. At the surface it seems like little more than asking whether the glass is half full or half empty, but it turns out that the mindset you CHOOSE changes EVERYTHING. It's not that one is true and the other is false, but that the mindset you adopt determines your entire approach to life, and that makes a big difference. When we choose a scarcity min